We provide concrete hydrodemolition for a complete renovation, removal of coatings or just brightening of the road surface.
Due to the geographical situation in central Europe, the density of road and rail tunnels is extremely high compared to other parts of the world. These bridges were mainly constructed with concrete building material in conjunction with reinforcing bars. Natural ageing (“carbonation“) and environmental factors such as static overloading or salt spreading are primary sources of damage to the concrete and reinforcement. Ensuring the safety of the tunnel requires timely and professional concrete repairs. For this purpose, the old concrete is removed so that reinforcing rods can be exposed and cleaned. A new corrosion protection system can then be applied, followed by a new top layer of concrete and a special coating.
The advantage of removing concrete with high-pressure water jets is that surfaces are treated gently and without vibrations, which prevents stress cracks. At the same time, the reinforcement is cleaned directly by the water jet and prepared for further processing steps.
Damaged concrete is partially removed with a water jet at up to 3000bar and 400 litres per minute; this is done by special removal robots, or manually by way of hand lances.
This process is used
Reference projects regarding the application Tunnel:
S35 Badl Peggau Deutschfeistritz
Concrete removal using the pilgrim step method with robot and hand lance.
ÖBB Karawanks Tunnel
In the ÖBB Karawanks tunnel, 160,000 m² of tunnel wall surface over a length of 8 km was cleaned. At the same time, the dirty water was reprocessed so that it could be used again for cleaning. For the work, the large-area cleaner (including crane assembly), the water treatment system, and the water tanks were mounted on wagons, and the cleaning was carried out directly from there.
Rail tunnel Jenbach
Renovation of a rail tunnel.
Tunnel Köln Grenzstraße
Concrete repair at damaged spots and surface preparation for a new coating
Vertical concrete removal
Tunnel Ofenauer Hiefler
Coating removal and surface preparation
Concrete repair and cleaning of surface for the next process steps
Tunnel S10 Freistadt
Concrete repair of damaged spots and surface preparation for a new sealing
Removal of coating